Fig. 5.

a CV profile of MnO/CoMn₂O₄ ⊂ GN at a scan rate of 0.1 mV s⁻¹ in the voltage range of 0.01–3.0 V. b The charge and discharge profiles of MnO/CoMn₂O₄ ⊂ GN. c Cycling performance and Coulombic efficiency of the CoMn₂O₄ and MnO/CoMn₂O₄ ⊂ GN electrodes at a current density of 0.1 A g⁻¹. d Rate performances of the CoMn₂O₄ and MnO/CoMn₂O₄ ⊂ GN electrodes at various current densities. e Cycling performance of the MnO/CoMn₂O₄ ⊂ GN electrode at a current density of 1 A g⁻¹